<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<script>
    var json={
        "name":"zhangsan",
        "age":"12",
        "address":["北京","上海","广州"]
    }
    alert(json.address);
</script>
</body>
</html>